Sylvania



R. FODERARO AND G. W. WILMOT.

DISCHARGE CONTROLLING MEANS FOR 1168.

APPLICATION FILED MAR. 18, IBM). RENEWED OCT. 17.1919. 1,324,588.Patented Dee; 9,1919.

2 SHEETS-SHEET I.

Wit macs RALPH FODERARO, or nRcHBALn,

AND GEORGE w. winivro'nor nAzLn'roiI, PENN;

SYLVANIA. I

DISCHARGE-CONTROLLING MEANS non nos.

Specification of Letters Patent.

Patented Dec. 9, 1919.

Application filed March is, 1916, Serial No. 84,999. Renewed lum r17,1919. Serial No. 331,492.

- citizen of the United States, and a resident of Archbald, county ofLackawanna, State of Pennsylvania, and GEORGE W. WILMOT, a

citizen of the United States, and a resident of Hazleton, county ofLuzerne, State of and usefill Improvements inDischarge-Controlling Meansfor Jigs, of which the following is a specification.

While our invention may be used to advantage for washing and separatingores in general from stone and other matter which it is desired toeliminate, it'is particularly eiiicient when used for washing coal andse arating the slate and stony particles therefrom.

One object of our invention is to provide means whereby a layer of slateis maintained at all times upon the controlling discharge gate tothereby. prevent the slate from passing out too freely and also toprevent wastage by reason of the passage of particles of coal throughthe opening intended for the discharge only of slate and other material,

such as stone, which it is desired to eliminate and remove.

A further object of our invention is to provide an improved constructionof means for controlling the position of the discharge gate with respectto the lower edge of the upright plate over the upper edge of which thecoal or corresponding lighter particles of ore or other material isdischarged.

Other objects and advantages of our in- 'vention will be referred to andpointed out in the detailed description of our invention which followsor will be apparent from such description.

In order that our invention may be clearly understood and its advantagesmore fully appreciated reference should be had to the accompanyingdrawings in which we have' illustrated one form of constructionembodying our invention. It will be understood, however, that changes inthe details of construction may be made within the scope of the claimswithout departing from the principle of our invention.

In the drawings Figure 1 is a vertical sectional view of a portion of ajig embodying our invention, said view being taken on the line 22 ofFig. 2;

v Fig. 2 is a top-plan view of a portion of a jig screen because suchmeans consti- Pennsylvania, have invented certain new tutes no part ofour invention. For ascertaining the construction of a jig of thecharacter of that to which our invention is applied reference may be hadto Letters Patent of the United States No. 1,055,730, issued March 11,1913 to Henry W. Faiker.

Extending forwardly from the forward end of the jig screen is a gate 3which controls the discharge of the slate, stone and like material,which it is desired to eliminate, underneath the lower edge of theupright breast plate 4. ihe gate 3 is provided with upturned sideflanges 5 which are situated upon the outersides of the opposite sides 2of the jig screen. The rear ends of these side flanges are extended andare bent or looped around a shaft 8 which is supported in bearings 9secured upon the sides 2 of the jig screen. It is apparent'that the controlling gate 3 is pivotally supported at what may be termed its rearedge. The side flanges 5 of the gate 3 are provided at their forwardends with projections 10 to which are secured the lower ends of ayoke-shaped member 11. 12 designates a rod having adjustable connectionwith the upper portion of the yoke-shaped member 11. The upper end ofthe said rod is connected with the forward end of a lever 15 pivoted at16 be tween the upper ends of the angular bars 17 which are supported attheir lower ends upon the'opposi-te sides 2 of the jig screen. To theopposite end of the said lever 15 a weight 18 is secured, said weightbeing adjustable to different positions upon the said lever, toward andaway from the pivot 16. It may be secured in any position to which itmay be adjusted by means of a bindingupon the said arm 20 andisadjustable there adjusted toward the lower outer end of the V the axisof the on. It is apparent that as the weight 21 is said arm itapproaches a vertical line extending through the pivot 16 therebydecreasing the leverage of the force of gravit of the said weight 21upon the lever 15. t is also apparent that as the lever 15 moves uponits pivot as indicated by the dotted lines 22 the horizontal distancebetween the weight 18 and the pivot 16 decreases while the horizontaldistance between the weight 21 and the saidpivot increases. By thismeans a. more nearly constant force is exerted at all times through theyoke-shaped member 11 and rod 12 upon the forward edge ofthe controllinggate 3 tending to hold the same upwardly against the lower edge of the'upright'plate 4. Preferably the weight 18 normally should be situatedapa horizontal plane through pivot of the lever 15, while the weight 21normally should be situated at a point below such. plane. This isdesirable in order that when the outer swinging end portion of the lever15 is lifted or elevated, the horizontal distance between the pivot 16and a vertical line through the weight 18 will decrease, while thehorizontal distance between the said pivot and a vertical line throughthe weight 21 will be inproximately in creased. It will, of course, beunderstood .that in actual practice the weight'lS may occupy a positiona short distance below the horizontal plane through the pivotal axis ofthe lever 15.

The forward end of the gate 3 (which is of sheet metal) is provided witha depending flange 25 the lower edge ofwhich is also flanged as shown at26. Secured to and supported upon the flanges 25 and 26 is atransversely extending plate 30, the upper edge of which extends abovethe plane of the upper surface of the gate 3. The plate 30 is providedwith slots 31 through which binding and holding bolts 32 extend. Theplate 30 may be adjusted todifi'erent positions and secured and held insuch positions by tightening the bolts 32 as is obvious.

For the purpose of adjusting the said plate 30 and also for the purposeof supporting the lower edge thereof we have pro vided the adjustablebolts 33 which are en- 'gaged with and extend through the forwardlyextending flange 26 at the lower edge of the flange 25. T he presence ofthe upper edge portion of the plate 30 projecting be yond or above theupper surface of the plate 3 causes the slate to pile up to a greater orless extent upon the said plate so it forms a layer thereupon andthereby prevents the slate and other particles which is desired toeliminate from passing too freely along the bottom of the said gate. lfithout the presence of the plate 30, which may be described a retardingplate, it is even a piece of coal, will lodge between the saidcontrolling gate 3 and the lower edge ofthe upright plate 4 and hold thegate open and thus prevent the weights 18 and 21 from closingthe said,gate and thereby permitting the slate to flow out altogether too freelyand in many instances permitting the escape or discharge of coalunderneath the lower edge of the said upright plate 4.

Coal as it is discharged over the upper edge of the plate it passesthrough alchute 35 and is discharged on to" the endless conveyer 36 andis removed thereby; The slate and other material discharged beneath thelower edge of the upright plate 1 is removed or carried away by theendless conveyer 37.

We claim 1.. The combination of a controlling discharge gate for a jig,said gate being pivot normally .being situated at a point below saidplane, whereby when the outer swinging end of said lever is elevated,the leverage of the first of said weights decreases and that of theother of said weights increases.

2. The combination of a controlling discharge gate for a jig, said gatebeing pivotally supported at its rear edge, a lever pivotally supportedintermediate its ends, said lever being situated a distance above saidgate, an adjustable connection between one end of said lever and theforward swinging edge of said gate, a plurality of weights supportedupon the opposite end portion of said lever, one of the said weightsnormally being situated at a point in or near a horizontal planeextending through the pivot of said lever, and the other one of saidweights being situated at a point below said plane,

whereby the leverage of the first of said weights decreases as theportion of said lever by which it is carried is elevated and.

the leverage of the other of said weights simultaneously increases, sothat the force due to gravity exerted by saidweights re mainspractically constant.

- 3. The combination of a controlling dis charge gate for a jig, saidgate being pivotally supported at its rear end, a lever spaced abovesaid gate and being pivotally supported intermediate its ends, aconnection between one end of said lever and the forward swinging end ofsaid gate, the opposite end portion of said lever being provided with adownwardly and forwardly extending arm, and weights, one of which issupported upon the opposite end portion of said lever and the other oneof which is supported upon the said arm.

4. The combination of a controlling discharge gate for a jig, said gatebeing pivotally supported at its rear edge, a lever spaced above saidgate and being pivotally supported intermediate its ends, a connectionbetween one end of said lever and the forward swinging end of said gate,the opposite end portion of said lever being provided with a forwardlycurved arm, said arm being concentric with the pivot of said lever, aweight adjustably supported upon the said opposite end portion of thelever, and a weight supported upon the said arm.

- 5. The combination of a charge gate for a jig, said gate beingpivotally supported at its rear edge, a lever pivotally supportedintermediate its ends a distance from said gate, means for connectingone end of said lever with the forward swinging edgeof said gate, aweight supported upon the outer swinging end portion of the said lever,an arm connected with the outer swinging portion of said lever, saidcontrolling dis-- arm extending downwardly and being concentric with thepivotal axis of said lever and a Weight secured upon said arm.

6. The combination charge gate for a jig, said gate being pivotallysupported at one edge, a lever pivotally supported intermediate its endsa distance from said gate, a connection between one end of said leverand the swinging edge of said gate and a plurality of means associatedwith the opposite end portion of said lever and exerting force thereonin opposition to the force exerted upon the said lever by the said gate,one of the said means be ing situated normally in or near a horizontalplane through the pivotal axis of said lever, and the other of saidmeans normally being situated below the said plane, whereby the forceexerted by'tlie first of said means decreases and that exerted by theother of said means increases as the portion of the said lever withwhich the said means are associated is raised.

In testimony that we claim the foregoing as our invention we havehereunto signed our names this 16 day of March, A. D. 1916.

RALPH FODERARO. GEORGE W. WILMOT.

of a controlling dis-

